Baker&#39;s oven.



W. SCHOENHAAR. BAKBR'S OVEN. APPLIoATIoN FILED MAR.19,1909.

940,559. Patented Nov. 16, 1909.

W. SCHOENHAAR.

BAKER'S OVEN. APPLICATION FILED HAB. 19, 1909.

, Patented Nov. 16, 1909 4 SHEETS-SHEET 2.

W. SCHOENHAAR. BAKERS OVEN. APPLIOATION FILED 11.411.19.1909.

Patented Nov. 16, 1909.

4 SHEETS-SHEET 3.

W. SCHOENHAAR.

BAKERS OVEN. APPLICATION FILED MAR.19,1909.

Patented Nov. 16, 1909.

4 SHEETS-SHEET 4.

WILLIAM scHoENrnaf-l'nfpr 4w11.1n11\i i'ro1v, DELAWARE.

y nnxnngs ovEN.

Specification of letters Ratent. Application and March 19, sayin No. 484,516:

Patented Nov. 16, 190).

To all 'wwm it may coacm:

Be it known that I, lVILLIAM cHoEN- HAAR, of Wilmington, in the county of Newcastle and State f Delaware, have invented certain new and useful Improvements in Bakers Ovens; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanyino' drawings, which form part of this speciiization.

This invention is an improvement in bakers ovens and its object 1s to make an oven of simple construction and economical of fuel, and in which the baking chamber can be 'heated either by direct or indirect firing, so that the oven can be used to best advantage according to thekind of food being cooked, and as desired by the operator. Directviring is preferableA for baking all kinds of pastry and foods requiring a quick intense heat, and for such urpose the products of combustion are le direct from the -re chamber through the baking chamber to the chimney. Indirect firing is preferable for baking other foods requirin lower and longer heat, and is accomplished by diverting the products of combustion from the baking chamber into flues exterior to the baking'chamber, so that the products of combustion are circulated around the baking chamber and heat the latter indirectly before. theyl escape to the uptake.

The present invention consists in the novel construction of the oven, including the arrangement of the fire chamber, baking chamber, iues and passages therein, as will be hereinafter fully explained with reference to the accompanying drawings which form part of this specification and which illustrate a practical oven embodying the invention.

In said drawings-Figure l is a top plan view 'of the oven indicating in dotted lines the arrangement of the heating iues and passages above the baking chamber. Fig.

..2 is a horizontal section on line 2-2, Fig. 3,

indicating in dotted lines the arrangement of the heating lues'below the baking chamber. Fig. 3 1s a Vertical transverse section on the lines 3-3, Fig. 2. Fig. 4i is a front end elevation of the oven. Fig, 5 is a longitudinal vertical section on line .Vi-5, Fig. 3. Fig. is a longitudinal vertical section on iii-ie 5L- Fig. 3.

ill-ie oven has a central baking chamber A;

and a 'ire chamber F having avgrate F2 and ash pit F" below'lthe grate; access can be had to the fire chamber through a door j' and to the ash pit through a doorf. The lire chamber is preferably arranged at one 'front corner of the oven and is adapted to discharge the products of combustion directly into the chamber A throughia passage if at the inneike'ndoif the fire chamber, said passage lc being closable by a damper K which may be operated by means of a `cord or chain K running over suitable pulleys K2 and through a passage in the wall of -the oven to the front end'thereof, where it is connected to a ring or pull K3 by which the damper K can be raised or lowered so as to open or close passage Ic.

When the damper K is opened, as indicated in Fi 2, the products of combustion pass from t e irechamber into t-he baking chamber A; and after circulating therein theypass out through flues lfm, in the side and end walls of the furnace, and escape through said iiues to an uptake C at the corner of the furnace, farthest removed from the re chamber F. v,Thus the products of combustion are caused to practically' circulate entirely through the baking chamber and highly heat the Same. If it is not desired to heat the baking chamber by direct tiring, damper K is closed. The tire chamber l" also communicates through a side passage N, see Fig. 3, with a central flue n beneath the floor ofthe baking chamber A; the passage N may be closed by a damper N. The Hue 'n extends longitudinally of the oven and' on opposite sides thercoil are the parallel lues n,'n2; and when damper N is opened the products of combustion after1 flowing back through flue n divide and pass into fines n', n?, as indicatedby the tailed larrows shown in dotted lines in Fig. 2 of the drawings, and the products after traversing flue fn. divide and enter flues n, n2 and return forwardly through lues n', n2 and then pass up through passages O and P into flues O', P above the baking chamber A, see Fig. l. The ilues O', P', are separated by an intermediate flue Q into which both dues O, P discharge at-the rear end of vthe oven, sec dotted tailed arrows in Fig. 1, and the reunited products then pass forwardly in fiue Q and escape from the latter through passage q to the chimney C, see Figs. 1 and 5. The passage q may be provided with a damper Q.

in the drawings the tailless arrows indiclosed by a door n, see F ig.'.6.

Yis,

cate the passa 4e of the products of combustion through t e baking chamber during the direct firing of the oven, and the tailed arrows indicate the passage of the products of combustion through the ues during in-v direct tiring of the oven.

In Fig. 4 03, g3, p3, 014,71?, indicate cleanout doors for the respective flues O', Q', P', N', n; flue' N2 may be cleaned out through an' opening at the back of the fire chamber The dampers M. L, N, may be operated by ull rods M, L, N3, as indicated in the rawings. `Access is had to the baking oven throughl a usual opening closed by a door a.

When the damper N is closed and the.v

L, M, opened the products of combustion pass from the ire chamber F directly into the baking chamber A, and thence through passages Z, m, to' the u take (l` heatiug the. oven quickly and directly by the products of combustion circulating thered u n1 pers K',

through. If the danipers L, K, M, are closed and dampers N, Q., opened,'the products of combustion will circulate from the fire chamber successively through lues fn., and n', 11.2, passages O, I), and lues O', P', to iiue Q', and thence ney; the products thus circulate both above and below the baking chamber and practically envelop the same and heat `the walls thereof very highly without subjecting the articles in the baking oven to direct action oi" the products, and in this way the oven muy bc continually fired and the baking (-,luuulwr maintained at any desired teniperature during the baking operations.

Above the lire chamber at a point where it is subjected to great heata boiler S and a hot'water container T may be 'conveniently arranged, as indicated in the drawinfrs.

I'Iaving described myv inventiom what I claim as new and desire to secure by Letters Patent thereon is:

l. A baking oven, a baking chamber, a chimney at one end thereof, a fire chamber' at the opposite end thereof, side and end passages connecting the bakin chamber with the chimney, dampers for' c osing said passages, a passage connecting the fire chambei' with the baking chamber, a' damper for through passage g to the chimrdamper for closing said closing said passage, chamber, a side chamber with said iues, a damper for closing said passage, similar iiues above the'baking chamber, passages in the furnace connecting the lower iues with the upper iiues, a passage leading from the upper ues to the chimney,and a damper for closing said passage.

2. A baking oven comprising chamber, a chnnney at one corner fire chamber at the corner farthest removed from the chimney, side and end: passages connecting the baking chamber with the chimney, dampers for avpassa e connecting the fire cham er with the baking chamber, a damper for .closing said passage, flues below the baking chamber, a passage in the side of the fire chamber communicating with the said iiues, a damper for closing said passage, flues above the baking chamber,'passages in the sides of the furnace connecting the lower iiues with the upper flues, a passage leading from the discharge end of the upper central.iue to the chimney, passage.

3. A baking oven comprisin chamber, a chimney at one en tire chamber at the opposite corner thereof, side andendassages connect the baking chamber with .the chimney, ampers for closing said passages, a passage connecting the fire chamber with the baking chamber, a passage, a central and two side fines below the baking chamber, a passage connecting the fire chamber with the said central {iu/e, a damper for closing said-passage,

a baking a baking three similar flues above the baking chamber, passages in the sides of the' furnace connecting the lower side iiues with the upper side flues, a passage leading from the discharge end of the upper central flue to the chimney, and a damper for closing said passage. Y

I n testimony that I claim the foregoing as my own, I aflix my signature in presence of two witnesses.

WILLIAM SCHOENHAAR.

IVitnesses:

LAWRENCE J. BRAMAN, ,Y JOHN F. LYNN.

fines below the baking assage connecting the re thereof,i a

the side walls of closing said assages,

and a damper for closing said thereof, 'a 

